After configuring our queue and exchange, we then subscribe to both the deployment start and stop messages. When our deployment start message arrives, we kick off our timer. If the deployment stop message arrives prior to our time limit, we will stop the timer without incident. If the deployment stop message does not arrive prior to our time limit, we will alert the user:

public void ProcessDeploymentStartMessage
(DeploymentStartMessage msg)
{
__deploymentTimer.Stop();
__deploymentTimer.Start();
}
public void ProcessDeploymentStopMessage(DeploymentStopMessage msg)
{
__deploymentTimer.Stop();
}